The migration has been a consolidated strategy and it has been utilized by the human beings in its permanent urge to find better living conditions. The possibility to migrate or not is a vital right, because by doing so it could be guaranteed in many cases the survival of the population, when by migrating they flee of an imminent risk in which life could be compromised, either by social, environmental, political or military causes; the migration involves both social and spatially dimensions; by migrating the social environment changes, and so the territory where life is developed; Space of lifeDepending on the cause factors, the migrations can be understood as the exercise of a right or as the consequence of the violation of one or more human rights. It depends on the origin of the decision of moving, if it is a voluntary and optional choice of changing temporary or permanently the place of habitual dwelling, or if it is a resource to flee living conditions that turn out to be unbearable. The migration in Colombia caused by the displacement not volunteer of the population, considered forced migration, is the topic of which the present investigation is occupied. The forced displacement in Colombia has generated migrations currents towards the metropolitan areas and the cities, influencing thus in the reactivation of the rural-urban flow of internal mobility.The impact of the forced displacement in the rural-urban migration is important. This phenomenon was intensified at the beginning of the decade of 1990, generating a flow of population that has arrived mainly to the intermediate cities, which has caused that urban areas are continually receiving flows of population coming from rural or semi-rural regions.The arrival of large flows of forced migrants to the urban space increase the demand of basic services, road infrastructure and necessary urban equipment to satisfy the needs of this population, mostly poor and with large lacks of attention. This is how the displacement also impacts in a negative way the receiver territory, generating high concentrations of urban population and leaving some small municipalities with negative balance causing, in some cases, the decrease of population or abandon of territories.The forced displacement does not only obey to the presence of armed actors. It is also a problem deeply connected with the possession of the land and to the interests of large territorial owners. Therefore, the relation that exits among the displacement, the violence and the appropriation of lands is one of the hypotheses to validate in the present investigation. The massive migration of the middle of the 20th century was concentrated predominantly in the homogeneous group of youths and young adults and composed mostly by women. Such selective migration by sex and age generated an imbalance in the distribution of gender of the population. This migratory selectivity, in which the women are those of greater probability of mobility, is maintained for the forced migration and is object of detailed analysis. The forced displacement concentrates primarily in the groups of age less than 18 years and in the adult women; in this manner a relevant demographic impact is being generated, similar to the migratory selectivity originated in the exodus of the decade of 1950.The forced mobility is a migratory movement of short distance that increases the conditions of poverty of the population affected. It hits upon greater intensity in strategic territories, owners of considerably natural resources or that have an evident, and important geopolitics, whether because they are located in the central zone of the country that is that of greater development or in territories of border.The connotation of being a forced migration in which many times the life of the population is in danger, determines that the flows of mobility in many cases are directed to the most nearby place, which offers some level of protection.Now well, the research that has been concluded is a work of high importance for the academic and politic field in Colombia. It is a complex exploration of the forced migration in the frame of the national territory, which required, in the first place, a historic analysis of the internal conflict in which the phenomenon is recorded, this analysis subsequently constituted a fundamental part of the explaining elements of territory related causes of forced migration. The study does a deep analysis of the social-demographic characteristics of the population affected by the phenomenon; gives a scope of the territorial distribution of the displaced population and the new human geography resulted of the massive migration that has as an origin area the rural zones of the country. Finally, the investigation undertakes the process of construction and analysis of the variables, as causal elements of continuance and backup of the forced migration, doing emphasis in some regions and particular zones of the country.